Constraining modified theories of gravity with the galaxy bispectrum

被引：28
|
作者：
Yamauchi, Daisuke [1 ]
Yokoyama, Shuichiro [2 ,3 ]
Tashiro, Hiroyuki [4 ]
机构：
[1] Kanagawa Univ, Fac Engn, Yokohama, Kanagawa 2218686, Japan
[2] Rikkyo Univ, Dept Phys, Tokyo 1718501, Japan
[3] Univ Tokyo, Kavli IPMU WPI, UTIAS, Kashiwa, Chiba 2778583, Japan
[4] Nagoya Univ, Grad Sch Sci, Dept Phys, Nagoya, Aichi 4648602, Japan
来源：
PHYSICAL REVIEW D | 2017年 / 96卷 / 12期
关键词：
SURVEY COSMOLOGICAL IMPLICATIONS; REDSHIFT SPACE; DARK ENERGY; EVOLUTION; MODELS; WEDGES; TIME;
D O I：
10.1103/PhysRevD.96.123516
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We explore the use of the galaxy bispectrum induced by the nonlinear gravitational evolution as a possible probe to test general scalar-tensor theories with second-order equations of motion. We find that time dependence of the leading second-order kernel is approximately characterized by one parameter, the second-order index, which is expected to trace the higher-order growth history of the Universe. We show that our new parameter can significantly carry new information about the nonlinear growth of structure. We forecast future constraints on the second-order index as well as the equation-of-state parameter and the growth index.
引用
收藏
页数：13
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